The AuthzSVNReposRelativeAccessFile should go above the Allow from all
directive.

Restart RhodeCode, Go to
the Admin ‣ Settings ‣ VCS page, and
click Generate Apache Config.
This will now generate a new configuration with enabled changes to read
the authz file. You can verify if changes were made by checking the generated
mod_dav_svn.conf file which is included in your apache configuration.

Specify new rules in the repository authz configuration.
edit a file in repo_name/conf/authz. For example, we specify that
only admin is allowed to push to develop branch